- FondsJeffreys - Papers and correspondence of Sir Harold Jeffreys
- SeriesB1-B316 - Research
- SubseriesB86-B191 - Seismology
- SubseriesB99-B107 - 'Ranbir Singh Sidhu and Manohan Gogna'
- FileB99-B102 - 'Ranbir Singh Sidhu and Manohan Gogna'
- FileB103-B106 - 'Various offprints & letters found with Ranbir [Singh Sidhu] and Manohan [L. Gogna]. Mostly Pacific, PKP Haddon, Adams, Randall and others 1970s'
- ItemB107 - Large format 'schetsboek'